Help:Surveyor Topology Height Adjust
From TrainzOnline
Adjust height (A)
Adjust Height allows finer control of the up and down movement. Click LMB and hold then push your mouse away from you to raise the terrain. Click LMB and hold then pull the mouse towards you to lower the terrain.
Generally used for finer adjustments.
Use in conjunction with the Radius and Sensitivity tools.
TRS2019 Effects Layers (Clutter and TurfFX)
When clutter effect is selected, the Height Adjust mode will adjust the density of the effect on the terrain.
See Effect Layers for further information on creating, using, and editing Effect Layers.